Tensile Strength of Carbon Nanotubes under Realistic Temperature and Strain Rate

Details Tensile Strength of Carbon Nanotubes under Realistic Temperature and Strain Rate Tensile Strength of Carbon Nanotubes under Realistic Temperature and Strain Rate

2002-02-27

arxiv.org/abs/cond-mat/0202513v2

Physics

Condensed Matter

9 pages, 7 figures, recently submitted for publication

Scientific paper

10.1103/PhysRevB.67.115407

Strain rate and temperature dependence of the tensile strength of single-walled carbon nanotubes has been investigated with molecular dynamics simulations. The tensile failure or yield strain is found to be strongly dependent on the temperature and strain rate. A transition state theory based predictive model is developed for the tensile failure of nanotubes. Based on the parameters fitted from high-strain rate and temperature dependent molecular dynamics simulations, the model predicts that a defect free $\mu m$ long single-wall nanotub at 300K, stretched with a strain rate of $1%/hour$, fails at about $9 \pm 1%$ tensile strain. This is in good agreement with recent experimental findings.

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